Heater.



' N0.79o,s84. PATBTBDMAYZS,1905.

o'. E. MOPHERSON HEATER. APPLICATION FILED NOV. 10, 1903. TBENEWED GUT.27, 1904:.`

C. E Mpwwg UNITED STATES Patented May 23, 1905.l

PATENT OFFICE. y

CHARLES E. MCPHERSON, OF ALLEGI-IENY, PENNSYLVANIA, ASSIGNOR, BY DIREO"AND MESNE ASSIGNMENTS, TO BENJAMIN A. GROAH, OF

PITTSBURG, PENNSYLVANIA.

HEATER.

SPECIFICATION forming part of Letters Patent No. 790,384, dated May 23,1905. Application iiled November 10, 1903. Renewed October 27, 1904.Serial No. 230,263.

To all whom it noa/y concern: y

Be it known that I, CHARLES E. MCPHEE:- s0N,a citizen of the UnitedStates of America, residing at Allegheny,in the county of Allegheny andState of Pennsylvania,have invented certain new and useful Improvementsin Heaters, of which the following is a specification, reference beinghad therein to the accompanying drawings.

This invention relates to certain new and useful improvements 1nheaters, more especially to that `class 1n which gas is employed as afuel; and the invention has for its object the provision of a heateradapted to receive its fuel from a gas-jet extended into the same, andwhich may be advantageously used for the heating of halls or rooms bythe disposal of the heater below the iioor of the room or hallway to beheated.

Briefly described, the invention comprises an outer and an inner shellor casing, the inner shell or casing suitably supported in the outer oneand having a closed upper end which carries a heating-coil, preferablyin the form of a spiral cone. The outer casing is suspended from a boxthat is supported from the floor and is covered with a radiator-coveringof the usual type or form of construction. A gasjet is extended throughthe outer casing and feeds into the lower end of the inner casing,

Y and means may be provided whereby the controlling valve or cock of thegas-supply line may be operated from above the heater. Means is alsoprovided for protecting the floor from the heat thrown o by the heater.

All of the above construction, together with other details entering intomy invention, will be hereinafter more specically described and thenparticularly pointed out in the claims, and in describing the inventionin detail reference will be had to the accompanying drawings, forming apart of this application, and wherein like numerals of reference will beemployed for designating like parts throughout the different views, inwhich- Figure 1 is a Yside elevation of my improved heater, showing aportion of the floor in section. Fig. 2 is a central vertical sectionalview. Fig. 3 is a top plan view with the radiator covering or gratingremoved. Fig. 4E is a top planview with the radiator covering or gratingand the top of the inner shell and the heating-coil removed. Fig. 5 is atop plan view of the Hoor-plate and radiator covering or grating. Fig. 6is a detached detail side elevation of the heating-coil. Fig. -7 is aperspective view illustrating how the controlling valve or cock in thegas-supply line may be operated from above the heater.

To put my invention into practice, I provide an outer casing or shell1,`generally made cylindricahthough not necessarily-so, and aninner'shell 2, conforming in contour to the outer shell 1. The shell 1at its upper end extends into a substantially rectangular boxor frame 3,theside walls of which are `turned over -at their upper edges to form aI flange 4, Which rests upon the shoulder provided therefor in therectangular floor-plate 5, which floor-plate is also recessed or shoul--dered to receive the radiator covering or grating 6, which may be ofthe ordinary form, having a shut-0E or dampers so arranged as to beturned to permit the heat to escape into the room or shut oif the heatfrom the room in the manner Well known. I preferably surround the box 3with an asbestos covering 7,

lwhereby to protect the adjacent wood from the heat. The inner shell orcasing 2 is preferably of less length than the outer shell or casing 1and is suitably supported therein, as by angle-brackets 8, this innershell or casing being provided with one or more openings 9 near theupper end to permit the escape of the combustibles. On the upper end ofthe inner shell or casing 2 is fitted a cap or cover 10, and this cap orcover has secured thereto a heating-coil 11, which in practice I havegenerally made of copperrod wound in spiral cone form, the apex of thecone being downward and lying at a point directly above the mixer andburner 12, carried on the gas-supply line 14:,which supply-line extendsthrough an opening 15 provided therefor in the outer shell or casing 1.The supply-line 14 is beneath the lower end of the inner shell or casing2, with the mixer and burner 12 projecting up into said casing; but inorder to protect the inner easing from the direct action of the Hames Iprovide same with an interior covering 16 of asbestos or otherheat-resisting material. As the heater is generally located below theroom or hallway which it is desired to heat, it is preferable to providemeans whereby the same may be operated from above the heater, and tothis end I attach to the stem of the valve 17 of the supply-pipe 14 arod 18, adapted to project up into the floor 19, whereby to be engagedand operated by the key 2O of suitable form. When so operated,thecontrolling-valve 17 will be so arranged that when turned to close thesame the valve will not be entirely seated, permitting suiicient gas topass through to burn as a pilot-light in the mixer and burner 12. Theprovision of a heating-coil 11 enables me to obtain a considerablygreater amount of heat than would be possible were the heating of theshells or casings alone accomplished, this copper coil throwing olf itsheat, which passes upwardly through the radiator covering or grating,The provision of the asbestos covering around the box 3 prevents anydanger of the wood adjacent to the box becoming overheated. The bottomof the box 3 is generally provided with one or more apertures 21. Thegas-supply 14 is pro-vided with a combined mixer and burner-top 12 onits end, the mixer being so constructed as to eect a perfect mixing ofthe air and gas prior to its reaching the point of ignition to assist ineffecting perfect combustion, which is rendered complete by theheat-producing coil l1 eliminating all fumes, so that only the heatedair passes up through radiator 6. In Fig. 1 I show at 22 how connectionmay be made with the box 3 and a flue (not shown) should this be desiredin any particular case.

While I have herein shown and described a practical embodiment of myinvention as it is practiced by me, it will be noted that variouschanges may be made in the details of construction without departingfrom the spirit thereof.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a heater of the type described, a box or frame suitably supported,an outer shell or casing fitted in said box or frame, an inner shell orcasing supported by the outer shell or casing, a lid or cover for saidinner shell, a heating-coil carried by said lid or cover. and afuel-supply communicating with the lower end of the inner shell,substantially as described.

2. In a heater of the type set forth, an openended casing and aremovable cover for closing one end of the casing carrying aheatingcoil, extending adjacent the opposite open end of the easing.

3. In a heater of the type set forth, a casing having its ends open, aremovable closure for one end of said easing carrying a heatingcoilextending adjacent the opposite casing end, and a heat-resistingmaterial in the casing below said coil.

4. In a heater of the type set forth a pair of open-ended casingslocated one within the other, a heating-coil supported from the top ofthe inner casing, and a fuel-supply leading into the bottom of saidinner casing.

5. In a heater of the type set forth, an openended casing and aremovable cover for closing one end of the casing, carrying a heatingdevice, extending adjacent the opposite end of the easing; substantiallyas described.

6. In a heater of the type set forth, an openended casing and aremovable cover for closing one end of the casing, carrying a heatingdevice, extending adjacent the opposite end of the casing, and arefractory lining` in said casing; substantially as described.

In testimony whereof I aiiix my signature in the presence of twowitnesses.

CHARLES E. MoPl-IERSON.

vWitnesses:

A. M. WILSON, E. E. POTTER.

